this post was submitted on 24 Jan 2026
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When I started programming with C, it was pretty easy to get code to compile on my first try.
Now, when I use C...
_POSIX_C_SOURCE >= 199309L... was in the man page, but didn't work..._GNU_SOURCEworks.Read somewhere to just use
-std=gnu17and remove_GNU_SOURCEand nice, it works.Create another project with
-std=gnu17, but using another function and now it doesn't work. Need to add_GNU_SOURCE. Why?